electrical problem

I have a problem with mine spt.883.1999. when the engine this cold it rolls well for ones 5 km when heats starts to have intermittent failures of electric order somebody can help me? Since already I am thankful for the aid.

Tanks for the aid, already verifiqui the circuit to breacker and all the fuses are good, verified that the cable of groud of the battery was with a corrosion well already removed it now goes to substitute.